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Study of KS KL Coupled Decays and KL -Be Interactions with the CMD-2 Detector at VEPP-2M Collider
- Publication Year :
- 1997
-
Abstract
- The integrated luminosity about 4000 inverse nanobarn of around phi meson mass ( 5 millions of phi mesons) has been collected with the CMD-2 detector at the VEPP-2M collider. A latest analysis of the KS KL coupled decays based on 30 % of available data is presented in this paper. The KS KL pairs from phi meson decays were reconstructed in the drift chamber when both kaons decayed into two charged particles. From a sample of 1423 coupled decays a selection of candidates to the CP violating KL into pi+ pi- decay was performed. CP violating decays were not identified because of the domination of events with a KL regenerating at the Be beam pipe into KS and a background from KL semileptonic decays. The regeneration cross section of 110 MeV/c KL mesons was found to be 53 +- 17 mb in agreement with theoretical expectations. The angular distribution of KS mesons after regeneration and the total cross section of KL for Be have been measured.<br />Comment: 14 pages, 8 figures
- Subjects :
- Physics
Nuclear and High Energy Physics
Particle physics
Luminosity (scattering theory)
Meson
Detector
High Energy Physics::Phenomenology
Charged particle
law.invention
High Energy Physics - Experiment
Nuclear physics
Angular distribution
law
High Energy Physics::Experiment
Collider
Beam (structure)
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....f59a9cafc88db7bdb2a2b6725e04a9e5